/* FileSaver.js
 * A saveAs() FileSaver implementation.
 * 1.3.2
 * 2016-06-16 18:25:19
 *
 * By Eli Grey, http://eligrey.com
 * License: MIT
 *   See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md
 */

/*global self */
/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */

/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */

var saveAs = saveAs || (function (view) {
  "use strict";
  // IE <10 is explicitly unsupported
  if (typeof view === "undefined" || typeof navigator !== "undefined"
      && /MSIE [1-9]\./.test(navigator.userAgent)) {
    return;
  }
  var
      doc = view.document
      // only get URL when necessary in case Blob.js hasn't overridden it yet
      , get_URL = function () {
        return view.URL || view.webkitURL || view;
      }
      , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
      , can_use_save_link = "download" in save_link
      , click = function (node) {
        var event = new MouseEvent("click");
        node.dispatchEvent(event);
      }
      , is_safari = /constructor/i.test(view.HTMLElement)
      , is_chrome_ios = /CriOS\/[\d]+/.test(navigator.userAgent)
      , throw_outside = function (ex) {
        (view.setImmediate || view.setTimeout)(function () {
          throw ex;
        }, 0);
      }
      , force_saveable_type = "application/octet-stream"
      // the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to
      , arbitrary_revoke_timeout = 1000 * 40 // in ms
      , revoke = function (file) {
        var revoker = function () {
          if (typeof file === "string") { // file is an object URL
            get_URL().revokeObjectURL(file);
          } else { // file is a File
            file.remove();
          }
        };
        setTimeout(revoker, arbitrary_revoke_timeout);
      }
      , dispatch = function (filesaver, event_types, event) {
        event_types = [].concat(event_types);
        var i = event_types.length;
        while (i--) {
          var listener = filesaver["on" + event_types[i]];
          if (typeof listener === "function") {
            try {
              listener.call(filesaver, event || filesaver);
            } catch (ex) {
              throw_outside(ex);
            }
          }
        }
      }
      , auto_bom = function (blob) {
        // prepend BOM for UTF-8 XML and text/* types (including HTML)
        // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF
        if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(
            blob.type)) {
          return new Blob([String.fromCharCode(0xFEFF), blob], {type: blob.type});
        }
        return blob;
      }
      , FileSaver = function (blob, name, no_auto_bom) {
        if (!no_auto_bom) {
          blob = auto_bom(blob);
        }
        // First try a.download, then web filesystem, then object URLs
        var
            filesaver = this
            , type = blob.type
            , force = type === force_saveable_type
            , object_url
            , dispatch_all = function () {
              dispatch(filesaver, "writestart progress write writeend".split(" "));
            }
            // on any filesys errors revert to saving with object URLs
            , fs_error = function () {
              if ((is_chrome_ios || (force && is_safari)) && view.FileReader) {
                // Safari doesn't allow downloading of blob urls
                var reader = new FileReader();
                reader.onloadend = function () {
                  var url = is_chrome_ios ? reader.result : reader.result.replace(
                      /^data:[^;]*;/, 'data:attachment/file;');
                  var popup = view.open(url, '_blank');
                  if (!popup) {
                    view.location.href = url;
                  }
                  url = undefined; // release reference before dispatching
                  filesaver.readyState = filesaver.DONE;
                  dispatch_all();
                };
                reader.readAsDataURL(blob);
                filesaver.readyState = filesaver.INIT;
                return;
              }
              // don't create more object URLs than needed
              if (!object_url) {
                object_url = get_URL().createObjectURL(blob);
              }
              if (force) {
                view.location.href = object_url;
              } else {
                var opened = view.open(object_url, "_blank");
                if (!opened) {
                  // Apple does not allow window.open, see https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html
                  view.location.href = object_url;
                }
              }
              filesaver.readyState = filesaver.DONE;
              dispatch_all();
              revoke(object_url);
            }
        ;
        filesaver.readyState = filesaver.INIT;

        if (can_use_save_link) {
          object_url = get_URL().createObjectURL(blob);
          setTimeout(function () {
            save_link.href = object_url;
            save_link.download = name;
            click(save_link);
            dispatch_all();
            revoke(object_url);
            filesaver.readyState = filesaver.DONE;
          });
          return;
        }

        fs_error();
      }
      , FS_proto = FileSaver.prototype
      , saveAs = function (blob, name, no_auto_bom) {
        return new FileSaver(blob, name || blob.name || "download", no_auto_bom);
      }
  ;
  // IE 10+ (native saveAs)
  if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
    return function (blob, name, no_auto_bom) {
      name = name || blob.name || "download";

      if (!no_auto_bom) {
        blob = auto_bom(blob);
      }
      return navigator.msSaveOrOpenBlob(blob, name);
    };
  }

  FS_proto.abort = function () {
  };
  FS_proto.readyState = FS_proto.INIT = 0;
  FS_proto.WRITING = 1;
  FS_proto.DONE = 2;

  FS_proto.error =
      FS_proto.onwritestart =
          FS_proto.onprogress =
              FS_proto.onwrite =
                  FS_proto.onabort =
                      FS_proto.onerror =
                          FS_proto.onwriteend =
                              null;

  return saveAs;
}(
    typeof self !== "undefined" && self
    || typeof window !== "undefined" && window
    || this.content
));
// `self` is undefined in Firefox for Android content script context
// while `this` is nsIContentFrameMessageManager
// with an attribute `content` that corresponds to the window

if (typeof module !== "undefined" && module.exports) {
  module.exports.saveAs = saveAs;
} else if ((typeof define !== "undefined" && define !== null) && (define.amd
    !== null)) {
  define([], function () {
    return saveAs;
  });
}